Abrading machine



Nov. 18, 1930.

P. MARCHESINI 1,782,269

ABRADING MACHINE Filed Sept. 17, 1928 2 Sheets-Sheet 1 a limi- Q. W,w mm

Patented Nov. 18, 1930 PATENT -.oF 1cE PETER MARCHESINI, or PEABODY,'MASSACHUSETTS ABRADING MAC INE I Application filed September resides in the novel subject matter hereinafter described and claimed, description be- 1 ing accomplished by reference to the accompanying drawings.

Fig. 1 is a side elevation. V Fig. 2 is a vertical transverse section on line 22 of Fig. 1. V r Fig. ,3 is'alongitudinal sectional view on line 3-3 of Fig. 2.

Fig. 4. is a horizon tal sectional view on line 44 of Fig. 3.

The construction selectedfor illustration will be rather specifically described, with the understanding that within the scope of. the invention as claimed variations,may be made. j I x I j l The numerals 5 denote two'parallel up right'side plates havingoutstanding flanges 6 at their lower edges adapted to be bolted or otherwise secured to afloor or analogous support. "Mountedin appropriate bearings 8 carried-by the uppe is a shaft 9 which is performing [roll 10. This sha driven in any desired manner, a t 11, a loose pulley 12, abelt 13,.and a .belt shifter 14: being shown forthis purpose. I

provided with a workft may be ly under the rolllO, is a' work-supporting table 15 which although slightly inclined is about horizontal as shown in Fig. 3. Screws l6pass' through vertical slots}? in the plates 5 and are threaded into the table 15 to support the'latter andto permityertical adjust mentthe .material to bef'sand-papercd or otherwise acted upon.

' Under the rolllO, table 15 is formed with a slot 18 extending longitudinally of said roll, 1

and this slot receives theupper portion of a pressing roll 19.- with trunnions 2O rv edges of the plates 5,

ight pulley thereof accoxdingtothe thickness of p This roll" 19 is provided a I which pass through vertically elongated openings 21in the side plates 17. 1928. Serial No. 306,400.

, 5 and are rotatably mounted in bearin s 2 2 atj'the outersides of said plates. These earings are bolted or otherwise securely mounted upon longitudinal arms 23 whose rear ends are pivoted to'the plates 5 as indicated at 24, permitting vertical movement of said arms and corresponding movementof the parts 2220 -:19, so as to cause the latter to press the work against. the roll 10 with any desired degree of pressure. Appropriate spring devices 25 "are connected with the arms 23 to normally'swing themdownwardly, the lower ends of these spring devices being preferably anchoredto the flanges 6.

"Forupwardly swinging the arms 23, two

longitu-dina'llevers' 27 are provided. These levers arefulcrumed between their ends at 28' to the plates 5 and the rear ends of said levers .underliethe front ends of said. arms. The front ends of the levers 27 are connected 5 by, a transverse bar 29 whiCh may be'pinned rathe'r loosely-to the '30. If desired-,the'front ends ofthese levers fmaybe provided with depressed seats 31 receiving the bar ends as shown. Connected Iwith' and extending downwardly from the center of the bar 29', is an elastic'operating I connection which may be formed of'a rod 32.

and'afspring 33;. [The lower end ofthis 0011- nection 32 isconnecte'd with afoot pedal34 "levers as indicated at rod 36 which extends between the lower 'portionsof the plates 5, spacingsleev'es37 being v f disposedaround said rodat oppo Extending between the plate 5 ,immediate v to varying thicknesses ofthe material beingsuch that thepressing roll 19 may float vertheilevers 27 and swing 9 oper extents. accord ng i sand-pampered or otherwise finished, and the constructionand arrangement of parts. is

g devices 25' normally lower the forming roll. 10... The

formed with inediately under said roll eratively connected with said arms for" upwardly swinging the-latter, said levers; being fulcrumed to said side .plates,

tically to compensate :for slight inaccuracies in the material, during which floating movement, the opposite ends of the roll need not move uniformly, due to the relative movement which the levers 27 and the arms 23 are permitted to have. All upward pressure of the roll 19 against the work is yieldable, due to the elastic connection 32.

While the general construction shown and described may be followed if desired, it is to be understood that-witl1in the scope of the invention as claimed, variations may be made.

I claim 1. In a machine of the class described, a pressing roll, two vertically swingable arms having bearings supporting said roll, two levers separate from and operatively con nected with said arms for upwardly swinging. them, springs operatively connected with said arms for downwardly swinging them, a transverse baroperatively connected with said levers, a foot pedal under the center of said bar,.and an elastic connection between said foot pedal and said center of said bar.

2. In a machine of the class described, two parallel side plates having alined openings, a pressing roll between said plates provided with trunnions passing loosely through said openings, horizontal arms having bearings forsaid trunnions, means at the rear ends of said arms pivoting them to saidplates, horizontal levers fulcrurned between their ends to saidplates in advance of said trunnions, the front ends of said arms being operatively connected with the rear ends of said levers, a transverse bar operatively-connected with the front ends of said leviers,' springs acting on said arms forswinging' them downwardly, a foot pedal below the center of said bar, and an elastic'connection between said bar and pedal, A 3, A machine of the class describedcome prising two" parallel vertical side plates alined openings spaced from 7 their upper edges, transverse work-per-- forming roll extending between'said side plates above said openings, a work-support ing table supported by saidxside platesimand having a slot extending longitudinally of the latter, a pressing roll whose upper portion is received, in said slot, said pressing roll being provided with trunnion's passing through the above named openings, arms at the outer sides of said side plates having bearings for said trun nions, meansat the rear endsofsaid arms pivoting. them to said side plates, levers opthe front; ends of springs acting ori'said armsjfor' normally swinging the sa ine downwardly,a

transverse; bar dperatively connected, with said levers, and depressing means for said bar embodying a foot pedal.

4. In a machine of the class described, a pressing roll, two vertically swingable arms having. bearings supporting said roll, two levers separate from and operatively connected with said arms for upwardly swinging them, springs operatively connected with said arms for downwardly swinging them, a transverse bar operatively connected with said levers, a foot pedal under the center of said bar, and a vertical connection between said foot pedal and said center of said bar.

In testimony whereof I have hereunto atfixed my signatureu PETER .MAROHESINI, 

